Core Standard: Observe, investigate and give examples of ways that the shape of land changes over time.(4.2.1, 4.2.2, 4.2.3)Core Standard: Describe how the supply of natural resources is limited and investigate ways that humans protect and harm the environment. (4.2.4, 4.2.5, 4.2.6)

4.2.1 Demonstrate and describe how smaller rocks come from the breakage and weathering of larger rocks in a process that occurs over a long period of time. 4.2.2 Describe how wind, water and glacial ice shape and reshape earth’s land surface by eroding rock and soil in some areas and depositing them in other areas in a process that occurs over a long period of time. 4.2.3 Describe how earthquakes, volcanoes and landslides suddenly change the shape of the land.4.2.4 Investigate earth materials that serve as natural resources and gather data to determine which ones are limited by supply. 4.2.5 Describe methods that humans currently use to extend the use of natural resources. 4.2.6 Describe ways in which humans have changed the natural environment. Explain if these changes have been detrimental or beneficial.